Foundation Calculator
Calculate concrete for foundations including footings and stem walls. Enter perimeter, footing width, depth, and wall dimensions.
๐๏ธ Foundation Calculator
Results
Footing Volume124.44 cu ft
Wall Volume746.67 cu ft
Total Volume871.11 cu ft
Cubic Yards32.3 cu yd
Order (+10%)35.5 cu yd
๐ก How to Calculate Foundation Concrete
Foundation concrete includes two parts: the footing (horizontal spread at the base) and the stem wall (vertical wall above the footing). Footing volume = perimeter ร width ร depth. Stem wall volume = perimeter ร thickness ร height. Total concrete = footing + wall.
Standard residential footings: 16โ24 inches wide, 8โ12 inches deep. Stem walls: 6โ8 inches thick, 8โ48 inches tall depending on grade and frost depth. Always add 10% to your order for waste, overpour, and variations in the trench. Under-ordering concrete is very expensive.
140 ft perimeter, 16" wide ร 8" deep footing, 8 ft ร 8" wall: footing = 124 cu ft + wall = 747 cu ft = 871 cu ft (32.3 cu yd). Order 35.5 cu yd (+10%).